File this under "things we could have sworn already existed." Microsoft just announced two mice, the Sculpt Mobile Mouse and Sculpt Comfort Mouse, and believe it or not, this marks the first time Redmond has made a pointing device with a hotkey for the Windows 8 Start screen. In addition to bringing up the Start Menu, you can use it return to the desktop, all without having to hit the keyboard. While the Mobile Mouse has just the Start key and a scroll wheel, though, the bigger Comfort Mouse takes things a step further: the button there doub